195393820381 has 4 divisors (see below), whose sum is σ = 197328412764. Its totient is φ = 193459228000.

The previous prime is 195393820379. The next prime is 195393820387. The reversal of 195393820381 is 183028393591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193454827225 + 1938993156 = 439835^2 + 44034^2 .

It is a cyclic number.

It is not a de Polignac number, because 195393820381 - 2¹ = 195393820379 is a prime.

It is a super-2 number, since 2×195393820381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195393820387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967296040 + ... + 967296241.

It is an arithmetic number, because the mean of its divisors is an integer number (49332103191).

Almost surely, 2^195393820381 is an apocalyptic number.

It is an amenable number.

195393820381 is a deficient number, since it is larger than the sum of its proper divisors (1934592383).

195393820381 is a wasteful number, since it uses less digits than its factorization.

195393820381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934592382.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The spelling of 195393820381 in words is "one hundred ninety-five billion, three hundred ninety-three million, eight hundred twenty thousand, three hundred eighty-one".